/*
 * Copyright 2012 NJUT  qixiaobo. All rights reserved.
 */
package com.fujitsu.nanjing.tieba.controller;

import java.awt.image.BufferedImage;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.fujitsu.nanjing.tieba.base.BaseController;
import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

/**
 * IndexController.java
 * 
 * @author Qixiaobo-win8
 */
@Controller
public class IndexController extends BaseController {
	@Resource
	private Producer captchaProducer;

	@RequestMapping(value = {"/", "/index"}, method = RequestMethod.GET)
	public String show(Model model) {
		return forward("/home/index");
	}
	/**
	 * 产生验证码的方法
	 * */
	@RequestMapping(value = "/captcha-image", method = RequestMethod.GET)
	public void createCaptcha(HttpServletRequest request,
			HttpServletResponse response) throws Exception {

		response.setDateHeader("Expires", 0);
		// Set standard HTTP/1.1 no-cache headers.
		response.setHeader("Cache-Control",
				"no-store, no-cache, must-revalidate");
		// Set IE extended HTTP/1.1 no-cache headers (use addHeader).
		response.addHeader("Cache-Control", "post-check=0, pre-check=0");
		// Set standard HTTP/1.0 no-cache header.
		response.setHeader("Pragma", "no-cache");
		// return a jpeg
		response.setContentType("image/jpeg");
		// create the text for the image
		String capText = captchaProducer.createText();
		// store the text in the session
		request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY,
				capText);
		// create the image with the text
		BufferedImage bi = captchaProducer.createImage(capText);
		ServletOutputStream out = response.getOutputStream();
		// write the data out
		ImageIO.write(bi, "jpg", out);
		try {
			out.flush();
		} finally {
			out.close();
		}
	}
	@RequestMapping(value = "/error", method = RequestMethod.GET)
	public String showError(Model model) {
		return "error";
	}
}
